The herbivore density at Katavi was surprisingly low. The biggest elephant and buffalo herds that we saw both had less than 10 members and there were periods where we drove for over an hour without seeing much of interest. Our guide said that it would be a lot easier to spot animals in around a month. I'd be interested to hear how this compares with other people's experiences of the park. In the four days that we were in the park we only saw four other vehicles so there were times when it felt like we had the place to ourselves. This included being the only vehicle at two excellent lion sightings so it was a very enjoyable trip.